Hi all - bzlib/date & bzlib/date-tz are now available via planet. They provide date & timezone manipulation capabilities (so you can find the future/past timezone offsets without messing with TZ environment variable). They currently work with srfi/19 date objects (not yet with PLT dates). (require (planet bzlib/date) (planet bzlib/date-tz)) You can find the tutorial at <a href="http://weblambda.blogspot.com/2009/10/introducing-bzlibdate-bzlibdate-tz-date.html">http://weblambda.blogspot.com/2009/10/introducing-bzlibdate-bzlibdate-tz-date.html</a> Cheers, yc